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Lookup<TKey,TElement>.Contains(TKey) Method

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Definition

Namespace:
System.Linq
Assemblies:
System.Core.dll, System.Linq.dll
Assemblies:
netstandard.dll, System.Linq.dll
Assembly:
System.Linq.dll
Assembly:
System.Core.dll
Assembly:
netstandard.dll
Source:
Lookup.cs
Source:
Lookup.cs
Source:
Lookup.cs

Determines whether a specified key is in the Lookup<TKey,TElement>.

public:
 virtual bool Contains(TKey key);
public bool Contains(TKey key);
abstract member Contains : 'Key -> bool
override this.Contains : 'Key -> bool
Public Function Contains (key As TKey) As Boolean

Parameters

key
TKey

The key to find in the Lookup<TKey,TElement>.

Returns

Boolean

true if key is in the Lookup<TKey,TElement>; otherwise, false.

Implements

Contains(TKey)

Examples

The following example demonstrates how to use Contains to determine whether a Lookup<TKey,TElement> contains a specified key. This code example is part of a larger example provided for the Lookup<TKey,TElement> class.

// Determine if there is a key with the value 'G' in the Lookup.
bool hasG = lookup.Contains('G');

' Determine if there is a key with the value 'G' in the Lookup.
Dim hasG As Boolean = lookup.Contains("G"c)

Applies to